95 into 89

by Skidtron89

II know it sounds like a long division problem that you wouldn’t want to do on paper, but it’s actually the title for a full set of instructions to put a D16Z6 OBD 1 conversion in your 88-91’ Honda Civic/CRX Si. Many people want to use piggyback computers and non-CARB approved parts, but why run your car illegally when you could get it done right the first time and be legal in the process? This swap will include the D16Z6 motor swap as well as all of its associated support equipment such as the P28 ECU and the full engine and ECU wiring harnesses.

There is no other emissions related device to worry about, as there is no EGR for either the D16A6 or the D16Z6 just a charcoal canister neither of which is electronically monitored by the ECU for the evaporative emissions like an OBD 2 system has. You will notice also that there are many parts being changed on the new motor. This is not necessary but if you do put new parts on the engine it won’t need to be serviced for a while, and you will have the peace of mind that comes with having a bunch of new parts on it. This is intended to be a guide not a perfect step by step although I have tried to make it as accurate as possible.

I have included a price vs. parts list as well. Hopefully there are very little mistakes and your swap goes well. It will be your responsibility to get your car / engine certified by the state of California when you are done with the swap. You can do so by going to you’re nearest state emissions referee. The California state referee scheduling center telephone number is 1-800-622-7733. I believe they can also tell you where the nearest referee is and how to get there. For further information concerning smog in the state of California you can check out the California Air Resources Board website at: http://www.arb.ca.gov/

If you do everything right you could have one of these if you live in the great state of California. I have been pulled over twice now with the emissions certification and been “searched” both times they haven’t asked any further questions after showing them the label and the CARB paper work for the Greddy turbo kit. One officer just said “That’s a nice setup you’ve got there. I’ve seen enough have a nice night.” I would have been sent to the referee both times for inspection if I didn’t have the label already not to mention the court time and costs.

And you engine bay should look like this when complete minus the turbo stuff of course.